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Finding the Fourth Proportional to 52.84, 79.22 and 20.77

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Solution

The fourth proportional to 52.84, 79.22 and 20.77 is: 31.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.84 : 79.22 = 20.77 : x
  2. Step 2: Convert to fraction form
    52.84/79.22 = 20.77/x
  3. Step 3: Cross multiply
    52.84x = 79.22 × 20.77
  4. Step 4: Simplify right side
    52.84x = 1,645.40
  5. Step 5: Solve for x
    x = 1,645.40/52.84
  6. Step 6: Final answer
    x = 31.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.